BUG: adding case path to support parallel execution (Fixes #449)

Closes #449

See merge request !101

- 1st problem arises when there are edges, but edgeNormals is empty.
  The UIndirectList fails (zero elements, non-zero addressing)

- further problem occurs if there is a mismatch in the number of edges
  and edges normals (incorrect indexing on loop).

- the regex was not being unset on assignment.
- drop unused recompile() method as being dubious

Fixes #416

Closes #416

See merge request !96

This scalar allows to introduce a factor for cloudy sky between 0 (clear) and 1 (fully cloudy)

Use subDict for changeDictionary, Fixes #409

Closes #409

See merge request !95

ENH:Delete 'not Implemented' function updateCoeffs() in slicedFvPatchField. ACMI patch is used with mesh.C() in isoSurface
which uses slicedFvPatch.

- makes it easier to switch between mpi implementations (eg, openmpi, intelmpi etc)

- add comment about compiler setting for KNL

boundaryRadiationProperties: updating to new format
dynamicMeshDict and snappyHexMeshDict in utorials/multiphase/interDyMFoam/RAS/motorBike to follow Mattijs Git lab id 381

BUG: noise - updated creation of control dictionary to allow -case option and env variables.  Fixes #402